Download PTU (Punjab Technical University) B.Tech (Bachelor of Technology) / BE (Bachelor of Engineering) 2021 January ME 3rd Sem 76417 Fluid Mechanics Previous Question Paper
Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (ME) (2018 Batch) (Sem.?3)
FLUID MECHANICS
Subject Code : BTME-301-18
M.Code : 76417
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Write briefly :
1.
Define compressibility and bulk modulus.
2.
State Pascal's law.
3.
State different types of fluid flow.
4.
Define Buoyancy.
5.
Define stream function and potential function.
6.
What do you mean by dimensional homogeneity and what are its applications?
7.
What are various losses in pipes?
8.
Show stable equilibrium of floating body with diagram.
9.
Define Euler number.
10. Name the five model laws of similarity in Dimensional Analysis.
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SECTION-B
11. Derive an expression for the time period of oscillation of a floating body in terms of
radius of gyration and meta-centric height of floating body.
12. The stream function for a two dimensional flow is given by 2xy, Calculate the velocity at
the point (2, 3). Find the velocity potential function also.
13. Derive continuity equation in cylindrical coordinates.
14. Discuss Kinetic Energy Correction and Momentum Correction Factors.
15. Evaluate the relation between stream function and velocity potential function.
SECTION-C
16. Water flows through a triangular right angled weir and then over a rectangular weir of lm
width. The discharge coefficients of the triangular and rectangular weirs are 0.6 and
0.7 respectively. If the depth of water over the triangular weir is 360 mm, find the depth
of water over the rectangular weir.
17. Show that momentum correction factor for laminar flow through a circular pipe is 4/3.
18. The pressure difference in a pipe of diameter D and length 1 due to turbulent flow
depends upon the velocity V, viscosity, density, and roughness k. Using Buckingham's pi
theorem obtain an expression for pressure difference.
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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This post was last modified on 26 June 2021